Fresno Reliability Transmission Projects Gary DeShazo Director, - - PowerPoint PPT Presentation

Fresno Reliability Transmission Projects

Gary DeShazo Director, Regional Transmission - North Board of Governors General Session March 25-26, 2010

Slide 2

Transmission is needed in the greater Fresno area by 2014 to maintain reliability.

• Need is associated with load growth in Fresno
• Load growth limits opportunities for the Helms pump

storage facility (Helms) to “recharge” its upper reservoir

• Reliable electric service in Fresno is dependent on

Helms generation

• The availability of Helms to generate is dependent on its

ability to “recharge”

• A Helms reliability dispatch model was used to

determine when reliability upgrades would be needed

The proposed transmission projects will address the reliability needs in the Fresno area

Slide 3

Los Banos Gates Moss Landing McCall Panoche Helms Kings San Joaquin Merced

Fresno Transmission Network

Gregg

  

500kV 230kV

The 2010 Transmission Plan identified these projects for approval by the ISO Board of Governors

Slide 4

Project Estimated Cost (million) Required In-Service Date Reconductor Panoche-McMullin 230 kV line $14 May 2014 Reconductor Panoche-Helm 230 kV and Helm-McCall 230 kV lines $35 May 2014 Reconductor McMullin-Kearney 230 kV line $10 May 2015 Reconductor McCall-Henrietta 230 kV line $20 May 2014 Reconductor Certainteed-Legrand 115 kV line $13 May 2015 Replace terminal equipment on Henrietta-Gates 230 kV line section $2 May 2014 Replace wave traps on Panoche-Gates 1 & 2 230 kV lines $1 May 2014 Modifications to the Helms pump dropping SPS. $13 May 2014 Obtain interim night time temperature adjusted ratings on 7 transmission lines $13 May 2014 Install local SPS to trip McCall 115 kV firm load for Category C contingency $0.50 May 2014 Install SPS to trip firm load for the Helms-Gregg #1 and #2 230 kV DCTL contingency $6 May 2014 Total $127.50

Panoche-Kearney and Henrietta-McCall 230 kV lines

• verload in 2014 with all lines in service scenario

Reconductor Panoche-Kearney and Henrietta-McCall 230 kV lines by 2014

Henrietta- McCall line

Slide 5

Panoche-Helm and Helm-McCall, 230 kV lines

• verload in 2014 during contingency scenario

Reconductor Panoche- Helm and Helm-McCall 230 kV lines by 2014

Slide 6

Warnerville-Wilson, Wilson-Storey, Gates-Panoche, Kearney Herndon, Gates-Gregg 230 kV lines overload during contingency scenario

Rerate various lines and modify Helms SPS by 2014

Gates- Gregg line Gates- Panoche lines

Slide 7

Management recommends that the Board approve the Fresno Reliability Transmission Projects

The proposed projects will:

• Address several reliability concerns in the Fresno area

beginning in 2014

• Provide the most cost-effective, feasible solutions to

meet the identified needs in this area

Slide 8